• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    TROUBLESHOOTING DEVICE IN PARTS Troubleshooting device in masked parts such as turbomachine blades, comprising a tubular sheath (28), light guide and image transmission means housed within the sheath, an examination head ( 62) at the distal end of the sheath (28) comprising means of illumination and image capture connected to the light guide and image transmission means housed within the sheath (28), means of spraying in succession of products of resudation on the piece to be examined, which comprises a capillary (32) guided with sliding inside a conduit housed within the sheath (28). The device also comprises means for adjusting the orientation of the examination head at the distal end of the sheath
    公开号:BR112013018388B1
    申请号:R112013018388-8
    申请日:2012-02-28
    公开日:2020-10-13
    发明作者:Sadia Bousquet；Pascal Cendrier；Jean-Claude Lemoal；Jean Rovegno
    申请人:Snecma；
    IPC主号:
    专利说明:

    [0001] The invention relates to an endoscopy search device for defects in masked parts, that is, not directly visible, such as, for example, parts in a turbomachinery.
    [0002] It is known to inspect the internal components of a material or a machine with the aid of an endoscope that is an elongated optical instrument of small diameter that is passed through a small hole in a wall to examine the appearance of the components that find on the other side of the wall. This endoscope can thus be used to inspect the blades of a turbomachine, such as a turbo-reactor or an airplane turboprop, without dismantling the turbomachine.
    [0003] To visualize the defects of a piece, it is known to use a resudding technique, which consists of placing organic products on the examined surface of the piece and observing in ultraviolet lighting the impregnation of organic compounds on the piece's surface. The presence of defects is revealed after drying the surface of the part and placing a developer product that highlights the organic product infiltrating the surface defects of the part when the part is illuminated with an ultraviolet light.
    [0004] In order to facilitate the use of the resurfacing technique in an airplane engine when the latter is fixed under the wing of the airplane, it has already been proposed in document US-A-4273110, to perform an endoscope that integrates resudiment control means . For this purpose, the proposed instrument comprises a rigid and elongated cylindrical sheath of small diameter inside which is a conduit that serves for the passage of the ultraviolet and visible light guide means towards an end of the instrument close to the piece to examine. The instrument also comprises an optical conduit for the integration of means of transmission and formation of images for the observation of the illuminated area, and several conduits that serve each one of them for the passage of one of the products of resudação.
    [0005] This type of instrument is relatively easy to use when looking to examine a masked piece, that is, not directly visible and located behind a wall. To do this, simply insert the rigid sheath through a hole in the wall and carry out the inspection as described above. The depositor also proposed in its previous application FR2857094 to carry out the resudding and observation with the aid of two separate endoscopes. In another earlier application FR2861185, the applicant proposed an endoscope with ultraviolet illumination and with a distal distal sight, the endoscope comprising a rigid tubular body.
    [0006] However, these prior devices require several independent conduits for the passage of the different resudation products, which imposes a large section of the endoscope and reduces its use to sufficiently large holes or passages.
    [0007] The invention has as main objective to bring a simple, satisfactory and inexpensive solution to this problem.
    [0008] For this purpose, it proposes a device to search for defects in masked parts accessible through a non-straight passage, inside a turbomachinery such as a turbo-reactor or an airplane turboprop, which comprises a tubular sheath and light guide means and transmission of images housed within the sheath for illumination and observation of a piece to be examined, characterized by the fact that it comprises an examination head at the distal end of the sheath, which comprises means of illumination and image capture connected to the light guide and image transmission means housed within the sheath, means of spraying in succession of resudation products on the piece to be examined, which comprises a guided capillary with sliding inside a conduit housed within the sheath, and the fact that that it comprises means for regulating the orientation of the examination head at the distal end of the sheath.
    [0009] The integration of a conduit inside the sheath allows the insertion and removal of a passage capillary of a resudation product, which is mounted inside the conduit with sliding, which allows successive use of several capillaries, each capillary being dedicated to the passage of a special resurfacing product. The diameter of the tubular sheath can thus be reduced in relation to a sheath of the prior art.
    [0010] The insertion of the capillary with sliding inside the conduit also allows the distal end of the capillary to be brought closer to the area of the part on which it is desired to apply a resud product. In this way, the means of illumination and image capture can be located in recoil from the distal end of the capillary. This prevents projections of a resudation product from being deposited on the means of illumination and image capture. When the operator wishes to observe the treated area, he pulls the proximal part of the capillary to bring its distal end closer to the distal end of the sheath.
    [0011] In accordance with another feature of the invention, the device comprises means of supplying air to the lighting and image capture means mounted on the distal end of the sheath.
    [0012] The air insufflation means prevent the pollution of the illumination and image capture means by the different resudation products injected through the dedicated capillaries mounted successively inside the conduit.
    [0013] In a special embodiment of the insufflation means, the latter comprise means of supplying air under pressure connected to an insufflation tube that flows into its distal end in the vicinity of the means of illumination and image capture.
    [0014] In a preferred embodiment of the invention, the pressurized air supply means are connected at the proximal end of the capillary duct to supply the duct with a continuous flow of air exiting its distal end.
    [0015] In operation, the air flow that flows permanently between the internal surface of the conduit and the capillary, prevents drops of resudation products such as acetone, a penetrant, an emulsifier, a developer or washing water to be deposited inside the conduit.
    [0016] According to another characteristic of the invention, the proximal end of the flexible sheath is connected to a handle intended to be fixed on the turbomachinery and the conduit that houses the capillary is extended inside the handle and is connected to a rigid tube taken by the handle that serves to insert the capillary into the conduit.
    [0017] According to another characteristic of the invention, the device comprises means of immobilization in sliding of the capillary inside the conduit, constituted by a tip intended to be inserted and retained at the free end of the rigid tube, the tip comprising clamping means of the capillary by clamping the latter.
    [0018] In a special embodiment of the invention, the tip comprises a passage that opens into the tube and forms an inlet intended to be connected to the air supply means under pressure.
    [0019] In this configuration, the tip comprising the clamping means also ensures the connection to the air supply means under pressure.
    [0020] According to a further feature of the invention, the means for adjusting the orientation comprise an angular orientation control member of the examination head mounted with rotation on the endoscopic handle and connected to means of transmission of the orientation head control command. examination, these means of transmission being housed within the sheath.
    [0021] The rotation of the control unit in one direction or the other allows to induce an inclination of the examination head in relation to the rest of the sheath.
    [0022] In a special embodiment of the invention, the means for adjusting the orientation of the examination head comprise at least two cables guided inside the sheath and fixed at the distal end of the same in the examination head at two diametrically opposite points and wound in tension in the proximal part of them in reverse directions on a rotating control device provided on the handle.
    [0023] In another special embodiment of the invention, the means for transmitting the guidance command comprise at least one rod which extends within the sheath and which is connected at its distal end to a mechanism for converting the rotation movement of the ring in a translational movement of the nail, the nail being connected by its distal end to an articulated finger with rotation at the distal end of the sheath around an axis perpendicular to the latter.
    [0024] The distal finger advantageously comprises an axial channel of passage of the capillary and is articulated with rotation between a position in which it is aligned with the axis of the sheath and a position in which it is oriented perpendicularly to the axis of the sheath.
    [0025] The rotation of the articulated finger induces a rotation of the distal end of the capillary, which allows the distal end of the capillary to be oriented angularly in space to carry out the projection of the resudation products on the piece to be controlled.
    [0026] In a preferred configuration of the invention, the tubular sheath is flexible and the capillary is malleable, which allows non-destructive control to be carried out on a part that is within a complex three-dimensional structure and accessible only through a narrow and not straight, which is not possible with a rigid structure endoscope.
    [0027] According to another feature of the invention, the distal end of the sheath is equipped with a spray tip at its distal end.
    [0028] The spray tip at the distal end of the capillary is preferably removable and selectable in a set of radial, prograde and retrograde spray tips.
    [0029] In a practical embodiment of the invention, the sheath has a circular section with a diameter between 6 and 10 mm and the capillary passage channel has a diameter of the order of 1.2 mm, the capillary having a diameter of order of 0.8 mm.
    [0030] According to another feature of the invention, the device comprises means for fixing to a turbomachine part, these means comprising an articulated arm connected to the handle.
    [0031] The invention also relates to a process of non-destructive control of a masked part inside a three-dimensional structure, with the aid of a device described above, the process consisting of: - inserting and guiding the examination head inside from a three-dimensional structure to an examination position of the piece to be controlled, - the examination head being positioned in front of the piece to be examined, feed the proximal end of the capillary with a first resudation product and apply that product through the distal end of the capillary on the piece to be examined; - slide the capillary out of the conduit in which it is housed; - sliding a second capillary into the conduit and bringing its distal end close to the part to be examined, and then feeding the proximal end of that second capillary with a second resurfacing product and applying that second product on the part to be examined.
    [0032] Other advantages and characteristics of the invention will appear with the reading of the following description made by way of non-limiting example and with reference to the attached drawings in which: - figure 1 is a schematic representation of a troubleshooting device according to the prior art; figure 2 is a schematic perspective view of a troubleshooting device according to the invention; figure 3 is a schematic sectional view of the flexible sheath of the device according to the invention; figure 4 is a schematic view in perspective and an enlarged scale of the proximal part of the device of figure 2; figure 5 is a schematic front view of a tip inside which a capillary of a resud product is inserted; figure 6 is a schematic representation of the distal end of the conduit that houses a capillary; figure 7 is a schematic view of the spraying of resud products; figure 8a is a schematic sectional view of the distal end of the flexible sheath of the device according to the invention; figure 8b is a schematic cross-section of the distal end of the examination head of the device according to the invention; figure 9 is a perspective view of an orientable examination head of the device according to the invention; figure 10 represents a schematic view of an endoscope retaining arm according to the invention; - figures 11 to 13 represent in perspective a rigid inspection tube endoscopic equipment, adapted to control by resudation under ultraviolet lighting in accordance with an embodiment of the invention, - figure 14 is a perspective view of the distal end of the endoscope of the figures 11 to 13, - figure 15 is a perspective view and longitudinal section of the endoscope of figures 11 to 13, - figure 16 is an exploded perspective view of the endoscope of figures 11 to 13, - figure 17 is a view exploded from the distal end of the endoscope of figures 11 to 13, - figure 18 is a schematic partial axial sectional view of an endoscope according to a variant of the invention, - figure 19 is a perspective view of the distal end endoscope in figure 18.
    [0033] First reference is made to figure 1 which represents a defect search device 10 according to the prior art, comprising a rigid tubular cylindrical rod 12 intended to be inserted by one end into an endoscopic hole 14 made, for example , on a wall of a turbomachine case 16 inside which is a part to be examined 18 such as a rotor blade for example.
    [0034] The cylindrical rod 12 comprises a conduit in which light guide and image transmission means are housed for the illumination and observation of the piece. The cylindrical rod 12 also comprises a spray conduit for resud products, such as acetone, a penetrant, an emulsifier and water. The end 20 of the rod 12, opposite to that inserted inside the orifice 14, is connected by a base 22 to means of supply with resudation products 24 and to means of illumination and control.
    [0035] This type of device requires the use of several independent conduits for the passage of different resudation products, which increases the diameter of the endoscope and limits its use to sufficiently large orifices or endoscopic passages.
    [0036] The device 26 according to the invention provides a solution to this difficulty by replacing the rigid cylindrical rod with a flexible sheath 28 comprising a swiveling examining head 62 and integrating a conduit 30 that accommodates a capillary 32 introduced with sliding into the conduit 30 (figures 2 and 3). In figure 3 a second conduit 34 is also visible, which serves for the passage of light guide means and means of image capture and image transmission. These means will be described in more detail below.
    [0037] The device comprises a substantially cylindrical endoscopic attachment 36 of which a first end is connected to the proximal end of the flexible sheath 28. The second end of the handle 36 carries a curved rigid tube 38 that flows into the handle 36 and which communicates with conduit 30 that houses capillary 32.
    [0038] The device 26 comprises means for immobilizing the capillary 32 inside the conduit 30. In a special embodiment (figures 4 and 5), these means comprise a tip 40 comprising a cylindrical or truncated skirt 42 inserted and tightened on the end free of the rigid tube 38. The tip 40 comprises a central hole 44 that allows the insertion of a capillary 32 inside the rigid tube 38 and then inside the conduit 30 that extends inside the flexible sheath 28 (figures 3 and 4) .
    [0039] The tip 40 comprises means for tightening the capillary 32 so as to immobilize the capillary 32 in relation to the tip 40. These means are realized, for example, by dimensioning the diameter of the orifice 44 so that it is slightly lower to the outside diameter of capillary 32. Thus, the capillary can be moved manually by sliding inside the tube 38 and is found at each relaxation of capillary 32 by the operator in an immobile position. To allow such a tightening, the tip 40 is made of a suitable plastic or elastomer, such as for example rubber.
    [0040] The device according to the invention also comprises means of blowing air at the level of the distal end of the sheath. For this purpose, the tip 40 comprises a second orifice 46 formed on its front face and which empties into the interior of the rigid tube 38. This orifice 46 is connected to means of air supply under pressure 48 that allow to supply the tube 38 and the duct 30 with a continuous air flow 50 exiting through the distal end of the duct 30. Thus, the outgoing air flow prevents pollution of the interior of the duct 30 by drops of the different resudation products (figure 5) and limits the projections of resudiment at the level of the means of illumination and image capture formed at the distal end of the sheath.
    [0041] When the air flow pressure is at least 0.3 bar, it is possible to dry the part with the air supply means, for example, between two successive applications of different resurfacing products.
    [0042] The proximal end of capillary 32 is connected to a reservoir of a given oozing product. The device can thus be used with several capillaries 32 each associated with a reservoir of a given resud product. Each capillary comprises a spray tip at its distal end that allows spraying the resud product in a special direction. The tip is advantageously removable and replaced as far as possible by other types of tips suitable for radial spraying 52, prograde 54 or retrograde 56 (figure 6).
    [0043] The device comprises means for capturing images and transmitting images represented in figure 8a. The image capture means comprise an image formation objective 64 that transmits the image to a camera 66, such as a CCD camera, connected at the output to an analog to digital converter. The scanned image is then transferred by a cable 68 to external display means such as a computer processing system monitor.
    [0044] In a special configuration of the device according to the invention, the camera 66 comprises 500000 pixels which each have a side between 8 and 12 pm.
    [0045] The device also comprises second image transmission means provided inside the sheath and which comprise a set of optical components (not shown) that transmit the image formed by the objective to an observation eyepiece 58 carried by the proximal end of the handle.
    [0046] The device also comprises means of illumination and light guide to the proximal end of the sheath. Such means comprise, for example, a fiber optic cable 70 extending from the distal end of the sheath to a connection 60 for connection to a visible or ultraviolet light source.
    [0047] In order to spray the resudation products in the optimum direction in the direction of the part and to properly observe the treated area, the device comprises means for adjusting the orientation of the examination head 62 (figures 8a and 8b).
    [0048] These adjustment means comprise, for example, two cables guided inside the sheath and fixed at the distal end of them on the examination head 62 at two diametrically opposite points 72, 74. The proximal parts of the cables are wound in tension in reverse directions on a rotating control device 76 (figure 2). Thus, by rotating the control member 76 in a given direction, the examination head 62 can be tilted in a plane that passes through the two attachment points 72, 74 and the central axis 76 of the examination head.
    [0049] It is possible to add two additional cables fixed at the distal end of them over the examination head 62 at two diametrically opposite points 78, 80 and at 90 ° of the two attachment points 72, 74 of the first two cables. The proximal parts of these two supplementary cables are also wrapped around a rotating member of the handle. With such an arrangement, it is thus possible to tilt the examination head 62 in two orthogonal planes of which one passes through points 72, 74 and the other passes through points 78, 80, which allows to orient the distal end of the sheath in four different directions .
    [0050] To allow the examination head 62 to be tilted, the latter may comprise metal rings 82, 84, 86 not joined (figure 9). A rim 84 is connected to a downstream rim 82 by two blades 88 spaced 180 ° at an angle, pivoting in rotation on the outer periphery of the downstream rim 82 and fixed on the rim 84 at 180 ° from one another. The rim 84 is attached to an upstream rim 86 by two lamellae 90 also spaced 180 ° at an angle and rotating at one end on the outer periphery of rim 84. The second ends of the two lamellae 90 are attached to an upstream rim 86 to 180 ° from each other. The lamellae 88 for joining the rim 84 to the downstream rim 82 and the lamellae 90 for joining the rim 84 to the upstream rim 86 are specified at 90 ° to each other (figure 9).
    [0051] Each ring comprises four dowels (not shown) spaced 90 ° two by two for the sliding guide of the cables fixed at the distal end of the examination head 62.
    [0052] In a variant of the invention, the control cables for the orientation of the examination head are wound in tension over a motorized rotating organ that can be housed inside the handle.
    [0053] Figure 10 represents a retaining arm 92 of the endoscope handle. This retaining arm 92 comprises two rods 94, 96 articulated with rotation 98 in relation to each other at the first of its ends. One clamp 100, 102 is hinged by a pivot connection at the second end of each rod 94, 96. A first clamp 100 is designed to tighten the handle of the endoscope 36 and the other clamp 102 is designed to be attached to a part of the turbomachinery to allow the use of the endoscope in the static position.
    [0054] In a variant of the invention (not shown), the air supply means under pressure are connected to a connection that leads to the rigid tube inside a common cavity formed inside the handle, the proximal end of the conduit opening into that cavity to allow passage of the inserted capillary from the free end of the rigid tube and the flow of air flow under pressure to the distal end of the sheath. In this configuration, the tip comprises a single central orifice for introducing a capillary.
    [0055] In a practical embodiment of the invention, the sheath 28 has a circular section with a diameter comprised between 6 and 10 millimeters (mm), the duct 30 of the capillary 32 has a diameter of the order of 1.2 mm and the capillary 32 has a diameter of about 0.8 mm. The flexible sheath can have a width of the order of 1.5 m.
    [0056] In another embodiment of the invention, the sheath could be rigid and the capillary malleable or else rigid. However, a rigid sheath that appears in the form of a stick as in the prior art, does not allow intervening in internal areas of the turbomachine only accessible by curved or non-straight passages.
    [0057] Thus, the use of a flexible sheath and a malleable capillary allows the non-destructive control of areas that are difficult to access without requiring a disassembly of the turbomachine in a maintenance shop, which reduces maintenance time and operating costs of the turbomachinery.
    [0058] Reference is now made to Figures 11 to 19 which represent other embodiments of the invention.
    [0059] The endoscope 104 comprises a handle 105 which comprises a proximal part 106 and a distal part 124 and a sheath that forms a rigid distal inspection tube 108. In figure 11, tube 108 is introduced into an inspection tube 110. The handle 106 comprises a focusing ring 112 and an eyepiece 114 housed within a removable proximal lens 116 capable of being connected to an endoscopic camera. The endoscope 104 comprises an illumination light transmission path comprising a bundle of illumination fibers (not shown) that extends into a lighting tube 118 integral with the handle 106. The distal part of the tube 108 comprises a wicket 120 in the distal end of an optical pathway image of the endoscope 104, and a window 122 behind which the previously polished distal end of the illumination fiber bundle can be glued.
    [0060] The endoscope comprises a tube 126 which comprises a distal lateral opening 128 under which the wicket or viewing window 120 and the lighting window 122 of the endoscope 104 are positioned (figure 11). The distal end of the tube 110 is integral with an articulated finger 130 that comprises an internal channel 132 that ends on one side in an orifice 134, and on the other, in a conduit or working channel 136 housed within the tube 110. The channel of work 136 flows into handle 124, on a base 138 that constitutes the proximal end of working channel 124. Working channel 124 is designed to allow sliding insertion of a malleable capillary tube 32 (figure 15), which can be inserted through base 138 and exit through hole 134. Such a capillary tube is intended for projecting the resudation products onto a piece to be controlled. The handle 124 further comprises a control ring 140 that allows to manually adjust the angle of the articulated finger 130. The handle 124 can also comprise a base 142 that can be connected to a source of compressed air, in communication with an insufflation tube air 144 that flows into the opening 128, parallel to the wicket 120 and the lighting window 122.
    [0061] In figures 13, 15 and 16, the distal portion 124 of the handle 105 comprises a cylindrical proximal housing 146 provided for receiving the distal cylindrical end 148 of the proximal portion 106 of the handle 105 of the endoscope 104. The housing 146 comprises a distal partition. 150 provided with an axial hole constituting the proximal end of an internal cylindrical tube 152 designed to receive the tube 108 of the endoscope 104. Means for joining and securing the handle 105 in the housing 146 may comprise an alignment and locking device (not shown) that allows the distal end of tube 108 of the endoscope to be correctly positioned under the distal opening 128 of the endoscope 104.
    [0062] The distal part 124 of the handle 105 comprises a proximal cylindrical part 154 of which the proximal part forms the cylindrical housing 146, and of which a distal tubular part 155 comprises a longitudinal slot 156.
    [0063] The endoscope comprises a ring 140 for the distal articulated finger 130. A cylindrical ring 158 is fixedly mounted inside the command ring 140 and comprises a helical slit 160 formed in its perimeter. A tubular hook 162 is slidably mounted around the inner tube 152 and comprises a radial finger 164 at its outer periphery. Navigator 162 is supported by two longitudinal operating rods 166, 168 that extend inside tube 126 and whose function is to control the angle of the distal articulated finger 130.
    [0064] The control ring 140 and the cylindrical ring 158 are mounted around the distal tubular part 155 of the proximal cylindrical part 154. The tubular hook 162 is mounted inside the tubular distal part 155 of the proximal cylindrical part 154 and the radial finger 164 crosses the longitudinal slit 156 of the distal tubular part 155 of the proximal cylindrical part 154 and its radially outer end comes to lodge in the helical slit 160 of the cylindrical ring 158.
    [0065] The distal part 124 of the handle 105 also comprises a central part 170 and a distal part 172 whose association with the proximal cylindrical part 154 allows to translate the distal part 124 of the handle 105 and the cylindrical ring 158 around the distal part. tube 155 of the proximal cylindrical part 154 while forming two lateral holes that allow the passage and fixation of the bases 138 and 142. The parts 154, 170, 172 can thus be joined together, for example, with the aid of two screws 174a, 174b inserted into holes provided for this purpose in part 172 and which are screwed into part 154.
    [0066] In operation, the rotation of the control ring 140 around the distal tubular part 155 of the proximal cylindrical part 154 induces a translational displacement of the radial finger 130 in the longitudinal slot 156, which induces an axial displacement of the tubular hook 162.
    [0067] The distal part of the tube 124 comprises a distal part 176 comprising - a proximal tubular cylindrical part 178 comprising an inner hole 180 provided for receiving the distal end of the inner tube 152, - a median tubular housing 182 which has the opening side 128 and a distal partition 184, the housing 182 being provided to receive the distal end of the tube 108 of the endoscope 104 inserted in the inner tube 152, - two distal longitudinal ears 186 that each comprise a transverse hole 188, - a longitudinal channel from which the proximal end receives the inflation tube 144 and from which the distal end flows into housing 182, - a longitudinal channel from which the proximal end receives working channel 136 and from which the distal part flows between the two ears 186, and - two longitudinal channels that flow between the two distal ears 186 and which receive the rods 166, 168 with sliding.
    [0068] The distal part of the inner part 176 is associated with an inner pulley 190 comprising an axial orifice 192 perpendicular to the axis of the tube 126 and an annular groove 194 provided to guide the capillary tube 32 introduced into the working channel 136 by the base 138. The articulated finger 130 comprises at its proximal end two ears 196 which each have a distal transverse orifice 198 and a proximal transverse orifice 200.
    [0069] The piece 176, the pulley 190 and the articulated finger 130 are joined by a cylindrical axis 202 that successively passes through the hole 188 of one of the distal ears 186 of the piece 176, the hole 198 of one of the proximal ears 196 of the finger 130 , orifice 192 of pulley 190, orifice 198 of the other of the proximal ears 196, and finally orifice 188 of the other of the distal ears 186 of part 176.
    [0070] The joint of the articulated finger 130 and the maneuvering rods 166, 168 is carried out separately for each rod with the aid of a respective transverse cylindrical axis 204, inserted into the distal hole 196 of one of the two ears 196 of the finger 130, and then, into a hole 206 provided at the distal end of each maneuver rod 166, 168.
    [0071] In operation, the finger 130 can thus tilt and be positioned angularly between an axial position in which it is aligned with the axis of the tube 124 (figure 13) and a position in which it is oriented perpendicularly to the axis of the tube 15 ( figure 14).
    [0072] The introduction of a capillary tube 32 into the working channel 136 and then into the channel 132, can be carried out when the articulated finger 130 is in the axial position. The positioning of the distal mouth of the capillary 32 on the piece to be controlled is made by turning the command ring 140 to orient the finger 130 in a direction perpendicular to the axis of the tube 126, and adjusting it under visual control with the aid of the endoscope 104, the length of the distal part of the capillary tube 32 that exceeds the finger 130.
    [0073] Figures 18 and 19 represent a flexible videoendoscopic probe adapted to control by resudation under illumination by UV light and access to internal areas of a turbomachinery.
    [0074] The videoendoscopic probe comprises a control handle, the distal end of which is attached to a flexible inspection tube 208, and of which the proximal end is generally attached to an umbilical cable (not shown) which allows the probe to be connected to devices of exploration such as a light generator.
    [0075] For flow control, the probe control handle is attached to a specific part 210 of which the distal end is integral with a distal sleeve 212. Part 210 comprises an oblique lateral tubular inlet 216 of which the outer end features an internal thread 214.
    [0076] The glove 212, which can be made of a malleable material, surrounds the proximal end of the inspection tube 208. The inspection tube 208 comprises a flexible distal joint 218 and a distal examination head 220 that houses an optoelectronic device comprising means of illumination and image capture analogous to those described with reference to figures 8a and 8b. A nut ring 222 is screwed into an external thread 224 of the distal axial end of part 210 to seal part 210 tightly with sleeve 212.
    [0077] Part 210 comprises an axial tubular channel 226 which houses the following connections: - a bundle of lighting fibers 28, - four malleable sheaths 230, and - a multi-conductor electrical cable 232.
    [0078] The bundle of lighting fibers 228 seamlessly connects a lighting window 234 located on a distal face of the distal head 220, to the proximal end of the umbilical cable of the videoendoscopic probe. The proximal end of the umbilical cable can be connected to a lighting generator capable of providing both white and UV light.
    [0079] The four sheaths 230 are provided to guide four malleable control cables of which the distal ends are integral with the distal joint 218 and of which the proximal ends are driven by a manual or motorized control organ, which can be housed inside the command handle. The control cables as well as the control unit can be similar to those described with reference to figures 8b and 9.
    [0080] The multi-conductor electric cable 232 connects the image capture device housed inside the distal head 220 to a video processor that can be housed inside the control handle. The video processor's main functions are to synchronize the distal image pickup and transform the electrical signal provided by the pickup into a normalized video signal. The image pickup is associated with a 235 lens that forms a viewing window also arranged on the distal face of the head 220.
    [0081] The oblique tubular inlet 216 of part 210 is provided to receive the proximal part 236 of a conduit or working channel, which is fixed, for example, by gluing to the oblique tubular inlet 216. The proximal part 236 can be made in a rigid material, for example, metallic. The distal end of the proximal part 236 of the working channel is attached (with the aid of a dismountable device for maintenance purposes and not shown) of the proximal end of a malleable proximal part 238 of the working channel, housed within the inspection tube 208 The distal end 238 of the proximal part of the working channel opens into an orifice 241 disposed on the distal face of the distal head or examination head 220 (figure 5A).
    [0082] The distal end of an intermediate tubular part 240 is screwed (or glued) into the oblique tubular inlet 216 of part 210 with the aid of an external distal thread.
    [0083] A coupling part 246 comprising a side entry 242 and a proximal axial entry can be tightly associated with part 240 with the aid of a ring 244 screwed in the perimeter of the intermediate part 240 and retained axially on an annular edge of the coupling part. A watertight o-ring is tightened at the interface between the coupling part 242 and the intermediate tubular part 240. The proximal axial inlet of the coupling part 246 has a diameter slightly larger than that of a malleable capillary 32 capable of being introduced into it. The proximal axial inlet of part 246 can be equipped with a removable sealing cap 248 made of malleable material and which has an axial orifice into which the operator can insert a capillary tube 32 which is capable of sliding into the working channel 236, 238 , until its distal part emerges from the orifice 241 in the distal face of the distal head 220. The side entrance 242 of the part 246 is connected to means of supplying air under pressure. In these conditions, the air introduced by the inlet 242 circulates within the annular space between the outer surface of the capillary tube 32 and the inner surface of the working channel 236, 238, until it flows through the orifice 241 of the distal head 80. Thus, the air thus introduced by inlet 242, it can prevent the resudation products projected by the distal mouth of the capillary tube 32 from depositing on the viewing window 235 and the lighting window 234 on the distal face of the head 220, and ensuring the cleaning of those windows. The air introduced into the work channel also avoids pollution of the work channel by drops of exudation product.
    [0084] The possibility of being able to directly disassemble the coupling device 246 is a great advantage in terms of maintenance, as it facilitates the periodic cleaning of the working channel 236, 238.
    [0085] According to another embodiment, the videoendoscopic probe lighting device may comprise at least two LED diodes, one emitting white light, the other UV light, these two LED diodes being installed at the distal end of the probe.
    [0086] In embodiments comprising a bundle of illumination fibers, the bundle of illumination fibers may be replaced by a liquid light guide suitable for transmitting UV light and white light, or associated with such a light guide liquid that can be removable.
    [0087] It will appear clearly to the professional that the present invention is susceptible to different variants of realization and different applications. In particular, the videoendoscopic probe described above may comprise an air insufflation tube separate from the working channel and which flows into the distal head 220 of the probe in order to send air over the lighting and viewing windows.
    [0088] The endoscope according to the invention can be used with flexible or rigid inspection tubes. In the case of an endoscope or videoendoscope with a flexible inspection tube equipped with a distal joint, the viewing and lighting windows can be lateral or axial. In the case where these windows are axial, the tube 126 comprises an opening that allows these windows to be oriented laterally with the aid of the articulation. In the case where these windows are lateral, the joint could not be used.
    [0089] In the different embodiments of the invention described above, the lighting fibers are made of a material suitable for transmitting visible light and UV light, for example, made of quartz or made of a polymer suitable for transmitting light at the same time white and UV light.
    [0090] Thanks to the insufflation of air over the means of illumination and image capture, it is not necessary at any time to remove the inspection tube from the endoscopic inspection hole, especially during or after the projection of resurfacing products on the part to be control, and this until the end of the visual control of the part under UV light illumination, which reduces the time required for endoscopic control operations.
    [0091] The injection of air into the working channel 236, 238 during the injection of the resudation products, combined with the fact that the capillary tube emerges from the distal end of the working channel, contributes to greatly reduce the pollution, both of the working channel and the examination head.
    [0092] It may be preferable to avoid mixing the various oozing products. In this case, a different capillary tube 32 can be used for the injection of each resud product. The capillary tubes used can thus be for single use.
    权利要求:
    Claims (17)
    [0001]
    1. Troubleshooting device in masked parts accessible through a non-straight passage, in a turbomachinery such as a turbo-reactor or an airplane turboprop, which comprises a tubular sheath (28, 126, 208) and means of guiding light and transmission of images housed in the sheath for illumination and observation of a piece to be examined, characterized by the fact that it comprises an examination head (62, 220) at the distal end of the sheath (28, 126, 208), which comprises means of lighting and image capture linked to the light guide and image transmission means housed in the sheath (28, 208), spraying means in succession of resudation products on the piece to be examined, comprising a capillary (32) guided with sliding in a conduit (30) housed in the sheath (28, 126, 208), and comprising means for adjusting the orientation of the examination head at the distal end of the sheath.
    [0002]
    2. Device according to claim 1, characterized by the fact that it comprises means of supplying air to the lighting and image capture means mounted on the distal end of the sheath.
    [0003]
    Device according to claim 2, characterized in that the air insufflation means comprise means of supplying air under pressure (48) connected to an insufflation tube (30) that flows into its distal end in the vicinity of the means of lighting and image capture.
    [0004]
    Device according to claim 3, characterized in that the air supply means under pressure are connected at the proximal end of the duct (30, 226) of the capillary passage (32) to the duct supply (30, 236) with a continuous flow of air exiting its distal end.
    [0005]
    Device according to any one of claims 1 to 4, characterized in that the proximal end of the sheath (28, 208) is connected to a handle (36) intended to be fixed on a turbomachinery and the duct (30, 136, 241) which houses the capillary (32) being extended inside the handle (36) and being connected to a rigid tube (38) carried by the handle (36) and serving for the insertion of the capillary (32) inside the conduit (30).
    [0006]
    6. Device according to claim 5, characterized in that it comprises means of immobilization in sliding of the capillary (32) inside the conduit (30).
    [0007]
    Device according to claim 6, characterized in that the immobilization means comprise a tip (40) comprising means for clamping the capillary (32) and intended to be engaged and retained at the free end of the rigid tube (38 ).
    [0008]
    8. Device according to the set of claims 4 and 7, characterized in that the tip (40) comprises a passage (46) that opens into the tube (38) and forms an entrance intended to be connected to the means pressure air supply (48).
    [0009]
    Device according to any one of claims 1 to 8, characterized in that the means for adjusting the orientation comprise a control member (76, 140) of the angular orientation of the examination head mounted in rotation on the endoscopic handle and connected to means of transmission of the control command of the examination head, these means of transmission being housed in the sheath (28, 126, 230).
    [0010]
    Device according to claim 8, characterized in that the means for adjusting the orientation of the examination head comprise at least two cables guided inside the sheath and fixed at the distal end of them in the examination head (62, 220 ) at two diametrically opposite points and wound in tension in the proximal part of the same in reverse directions on a rotating control device provided on the handle (36).
    [0011]
    Device according to claim 9, characterized in that the means of transmission of the steering control comprise at least one rod (166, 168) extending inside the sheath (126) and connected at its distal end to a mechanism for converting the rotational movement of the ring into a translational movement of the rod, the rod being connected by its distal end to a finger (130) articulated with rotation at the distal end of the sheath (126) about an axis perpendicular to that last one.
    [0012]
    12. Device according to claim 11, characterized in that the distal finger (130) comprises an axial channel (132) through which the capillary passes (32) and is articulated with rotation between a position in which it is aligned with the sheath axis (126) and a position in which it is oriented perpendicular to the sheath axis (126).
    [0013]
    Device according to any one of claims 1 to 12, characterized in that the tubular sheath (28, 218) is flexible and the capillary (32) is malleable.
    [0014]
    Device according to any one of claims 1 to 13, characterized in that the distal end of the sheath (28) is equipped with a spray tip at its distal end.
    [0015]
    15. Device according to claim 14, characterized in that the spray tip at the distal end of the capillary (32) is removable and selectable in a set of radial, prograde and retrograde spray tips.
    [0016]
    16. Device according to any one of claims 1 to 15, characterized in that the sheath (28) has a circular section with a diameter between 6 and 10 mm and the conduit (30) for the capillary passage (32) it has a diameter of the order of 1.2 mm, the capillary (32) having a diameter of the order of 0.8 mm.
    [0017]
    17. Non-destructive control process by resudging a masked part by means of the device as defined in any one of claims 1 to 16, characterized by the fact that it consists of: - inserting and guiding the examination head within a three-dimensional structure to an examination position of the piece to be controlled, - the examination head being positioned in front of the piece to be examined, feed the proximal end of the capillary with a first resurfacing product and apply that product through the distal end of the capillary on the piece to be examined ; - slide the capillary out of the conduit in which it is housed, - slide a second capillary into the conduit and bring its distal end close to the piece to be examined, and then feed the proximal end of that second capillary with a second product of resudiment and apply this second product by the distal end over the part to be examined.
    类似技术:
    公开号 | 公开日 | 专利标题
    BR112013018388B1|2020-10-13|fault finding device in masked parts accessible through a non-straight passage and non-destructive control process by resudging a masked part using such a device
    US9146576B2|2015-09-29|Arthroscope rotation mechanisms and methods of endoscopic rotation
    US5156142A|1992-10-20|Endoscope
    JP3774818B2|2006-05-17|Device for penetration of body tissue
    US5209219A|1993-05-11|Endoscope adaptor
    US4146019A|1979-03-27|Multichannel endoscope
    US5368014A|1994-11-29|Modular endoscope having easily replaceable parts
    US4624243A|1986-11-25|Endoscope having a reusable eyepiece and a disposable distal section
    US4762120A|1988-08-09|Endoscopic device having handle assembly and catheter assembly
    US5313934A|1994-05-24|Lens cleaning means for invasive viewing medical instruments
    US6471638B1|2002-10-29|Surgical apparatus
    US5351678A|1994-10-04|Endoscope scope assembly for full hemisphere view
    US5634790A|1997-06-03|Video dental medical instrument
    US4756304A|1988-07-12|Arthroscopic video camera system
    US7883459B2|2011-02-08|Endoscope and method for repairing the same
    JP2007520287A|2007-07-26|Endoscope with flexible probe
    JP2001008885A|2001-01-16|Electronic endoscope
    US20020103420A1|2002-08-01|Endoscope with alterable viewing angle
    CA2060436A1|1992-08-02|Laparoscope having means for removing image impeding material from a distal lens
    WO2004026125A1|2004-04-01|Endoscope
    US20130204083A1|2013-08-08|Sheathless arthroscope and system
    US5830126A|1998-11-03|Endoscope unit
    US20070238931A1|2007-10-11|Medical videoscope with a pivotably adjustable end part
    JPH06209904A|1994-08-02|Endoscope
    JPH078439A|1995-01-13|Hard endoscope
    同族专利:
    公开号 | 公开日
    CN103597340B|2016-04-27|
    WO2012117196A1|2012-09-07|
    CA2824382A1|2012-09-07|
    EP2681537A1|2014-01-08|
    US9693021B2|2017-06-27|
    RU2013143793A|2015-04-10|
    BR112013018388A2|2016-10-11|
    CN103597340A|2014-02-19|
    JP6118736B2|2017-04-19|
    JP2014508328A|2014-04-03|
    US20130321612A1|2013-12-05|
    CA2824382C|2018-07-17|
    US20170134626A1|2017-05-11|
    RU2598157C2|2016-09-20|
    US9699417B2|2017-07-04|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3456641A|1964-09-30|1969-07-22|Tokyo Shibaura Electric Co|Flexible endoscope for photographing diseased parts in cancer diagnosis|
    US4175545A|1977-03-10|1979-11-27|Zafmedico Corp.|Method and apparatus for fiber-optic cardiovascular endoscopy|
    FR2430754A1|1978-07-13|1980-02-08|Groux Jean|ULTRAVIOLET ENDOSCOPE|
    DE3214615C2|1981-04-21|1985-04-25|Kabushiki Kaisha Medos Kenkyusho, Tokio/Tokyo|Curvature control arrangement for an endoscope|
    DE3438971A1|1984-04-03|1985-10-10|Kraftwerk Union AG, 4330 Mülheim|SPECIAL ENDOSCOPE FOR OPTICAL TISSUE INSPECTION|
    US4784118A|1987-04-28|1988-11-15|Endotherapeutics|Optical viewing device|
    US4995872A|1989-10-04|1991-02-26|Ferrara Janice J|Expandable catheter and bridge device|
    JPH0452614A|1990-06-20|1992-02-20|Olympus Optical Co Ltd|Endoscope|
    US5115136A|1990-08-06|1992-05-19|Olympus Corporation|Ultraviolet remote visual inspection system|
    US5644394A|1994-10-19|1997-07-01|United Technologies Corporation|System for repairing damaged gas turbine engine airfoils|
    JP3889875B2|1998-03-13|2007-03-07|オリンパス株式会社|Endoscope|
    FR2782165B1|1998-08-05|2000-12-29|Pierre Marie Pailliotet|METHOD AND DEVICE FOR NON-DESTRUCTIVE SURFACE CONDITION USING A COLORING PRODUCT|
    US6876446B2|2001-12-21|2005-04-05|Spx Corporation|Bore scope with test light|
    US6941614B2|2002-05-23|2005-09-13|John E. Montgomery|Carpet grooming attachment|
    FR2857094B1|2003-07-04|2005-08-26|Snecma Moteurs|DEVICE FOR SEARCHING AND DETECTING DEFECTS OF PARTS BY ENDOSCOPY|
    US20050041097A1|2003-08-19|2005-02-24|Bernstein Robert M.|Non-medical videoscope|
    FR2861185B1|2003-10-16|2005-12-30|Snecma Moteurs|ENDOSCOPE WITH ULTRAVIOLET LIGHTING|
    JP2005168770A|2003-12-10|2005-06-30|Olympus Corp|Endoscope|
    JP4477519B2|2005-02-14|2010-06-09|オリンパス株式会社|Endoscope|
    JP4632039B2|2005-05-25|2011-02-23|富士フイルム株式会社|High frequency treatment tool|
    JP4731304B2|2005-12-14|2011-07-20|Ｈｏｙａ株式会社|Endoscope liquid applicator|
    JP2010063485A|2008-09-08|2010-03-25|Fujifilm Corp|Illumination optical system for endoscope and endoscope|
    CN201364313Y|2009-03-18|2009-12-16|福州灵点光学仪器有限公司|Steering device of endoscope|
    CN201421523Y|2009-04-28|2010-03-10|上海市电力公司|Novel industrial electronic endoscope|
    JP2010286315A|2009-06-10|2010-12-24|Olympus Corp|Contactless flaw detection device|
    GB2474834B|2009-10-28|2013-09-11|Rolls Royce Plc|A method of inspecting and/or repairing component and a device for inspecting and/or repairing a component|
    CN201689051U|2010-01-21|2010-12-29|宁波舜宇光电信息有限公司|Technoscope|US7502068B2|2004-06-22|2009-03-10|International Business Machines Corporation|Sensor for imaging inside equipment|
    JP5305726B2|2008-05-07|2013-10-02|キヤノン株式会社|Image forming apparatus|
    US10557407B2|2011-07-28|2020-02-11|Pratt & Whitney Canada Corp.|Rotary internal combustion engine with pilot subchamber|
    US10041402B2|2016-05-12|2018-08-07|Pratt & Whitney Canada Corp.|Internal combustion engine with split pilot injection|
    US9528434B1|2011-07-28|2016-12-27|Pratt & Whitney Canada Corp.|Rotary internal combustion engine with pilot subchamber|
    US10544732B2|2011-07-28|2020-01-28|Pratt & Whitney Canada Corp.|Rotary internal combustion engine with removable subchamber insert|
    US9038594B2|2011-07-28|2015-05-26|Pratt & Whitney Canada Corp.|Rotary internal combustion engine with pilot subchamber|
    NL2013769B1|2014-11-11|2016-10-06|Koninklijke Luchtvaart Mij N V|Method for inspecting and/or repairing surface damage of a component in an interior of a device, using fluorescent penetrant inspection , as well as borescope system and borescope inspection kit.|
    CN104816836A|2015-05-07|2015-08-05|哈尔滨飞机工业集团有限责任公司|Method for identifying tail rotor blade air bag types through air bag separating face traces|
    CN105223205A|2015-09-16|2016-01-06|中广核检测技术有限公司|Nuclear power station steam generator demarcation strip long-distance video checks and measuring system|
    FR3048284B1|2016-02-29|2018-03-02|Safran Aircraft Engines|DEVICE FOR SEARCHING FOR DEFECTS ON PARTS BY ENDOSCOPY|
    DE102016206810A1|2016-04-21|2017-10-26|Zf Friedrichshafen Ag|Endoscopic device for automated examination|
    CN106093063A|2016-05-30|2016-11-09|中国商用飞机有限责任公司|Aircraft visually inspects detection mirror and light source control method thereof and control device|
    US11141566B2|2016-11-06|2021-10-12|Bendit Technologies Ltd.|Steering tool|
    US11253140B2|2017-03-22|2022-02-22|Hilary C. Antonioli|Apparatus and method for monitoring differential pressure|
    US10145291B1|2017-10-10|2018-12-04|Pratt & Whitney Canada Corp.|Rotary engine and method of combusting fuel|
    US10801394B2|2017-11-29|2020-10-13|Pratt & Whitney Canada Corp.|Rotary engine with pilot subchambers|
    US10962345B2|2018-05-23|2021-03-30|General Electric Company|Tool and method for inspecting an annular space of an engine|
    CN109613012A|2019-02-20|2019-04-12|南京工业大学|A kind of product defects detection system and detection method based on endoscope|
    CN110687131A|2019-09-27|2020-01-14|天津大学|Automatic detection device for inner wall defects of micro-holes|
    CN111288968B|2020-03-26|2021-02-26|中国科学院长春光学精密机械与物理研究所|Space target automatic measurement system based on active search strategy|
    法律状态:
    2018-12-18| B06F| Objections, documents and/or translations needed after an examination request according art. 34 industrial property law|
    2019-09-17| B06U| Preliminary requirement: requests with searches performed by other patent offices: suspension of the patent application procedure|
    2020-05-12| B09A| Decision: intention to grant|
    2020-10-13| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 28/02/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1151616A|FR2972053B1|2011-02-28|2011-02-28|METHOD AND APPARATUS FOR ENDOSCOPIC INSPECTION BY RINSING|
    FR1151616|2011-02-28|
    FR1152123|2011-03-15|
    FR1152123A|FR2972800B1|2011-03-15|2011-03-15|DEVICE FOR SEARCHING FOR DEFECTS ON PARTS BY ENDOSCOPY|
    PCT/FR2012/050411|WO2012117196A1|2011-02-28|2012-02-28|Device for searching for defects on parts by endoscopy|
    [返回顶部]